Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
manh han » manh hai, manh hon, anh han
duc manh » suc manh, duc anh, duc minh
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ky ((nang xa) or (lang xa)) hoi. hieu van cau duc manh han tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu van cau duc manh han tai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky ((nang xa) or (lang xa)) hoi. hieu van cau duc manh han tai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky ((nang xa) or (lang xa)) hoi. hieu van cau duc manh han tai cua tu*.