Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cuu san » cuu van, cua san, cuu ban
duc ban » duc tan, duc van, dua ban
van cam » van nam, van lam, van cau
ty nang » ky nang, ty xang, ty hang
anh tu » anh tuan
tu cua » hu cua, vu cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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)) ty nang x hoi. hieu van cam ((duc ban) or (cuu san)) anh tu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. hieu van cam ((duc ban) OR (cuu san)) anh tu cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang x hoi. hieu van cam ((duc ban) or (cuu san)) anh tu cua te*".