Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
mua van » mua ban, mua dan, qua van
cua tre » cua te, cuu tre, dua tren
ma van » mai van, va van, ha van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang xa hoi. thien van nam ((mua van) or (ma van)) thanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. thien van nam ((mua van) OR (ma van)) thanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang xa hoi. thien van nam ((mua van) or (ma van)) thanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. thien van nam ((mua van) or (ma van)) thanh vi ((cua tre) OR (cua triet))*.