Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
tinh vi » trinh vi, tinh voi, tinh va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di 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 sach ty nang xa hoi. ((thien van) or (lieu va)) lam ((luc va) or (tuc va)) tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. ((thien van) OR (lieu va)) lam ((luc va) OR (tuc va)) tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. ((thien van) or (lieu va)) lam ((luc va) or (tuc va)) tinh vi cua tre*.