Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
cac xuc » cam xuc, cac nuoc, chat xuc
va tinh » may tinh
doi cua » dai cua, hoi cua
tu sach » thu sach, te sach, tu cach
xuc va » duc va, tuc va, luc va
di cua » dai cua, de cua, do 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) or (su sach)) ky tang xa hoi. hieu cua cac xuc va tinh ((di cua) OR (doi cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky tang xa hoi. hieu cua cac xuc va tinh ((di cua) OR (doi cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky tang xa hoi. hieu cua cac xuc va tinh ((di cua) OR (doi cua)) viet*".