Perhaps you should try some spelling variations:
thien van » thi van
hoc truc » hoc thuc, hoc trung, hoc thuoc
tu cach » tu cac
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van hoc » van hoa
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
vai cua » hai cua, lai cua, bai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang xa hoi. thien van hoc truc va danh ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang xa hoi. thien van hoc truc va danh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang xa hoi. thien van hoc truc va danh ((vai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang xa hoi. thien van hoc truc va danh ((vai cua) OR (dai cua)) tre*.