Perhaps you should try some spelling variations:
te sach » toc sach
han tai » hang tai, nhan tai, van tai
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
cuc tre » duc tre, cua tre, cuu tre
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
thu san » thuy san, thu ban, phu san
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu san)) ky tang xa hoi. hieu va cam ((luc va) or (truc va)) han tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu san)) ky tang xa hoi. hieu va cam ((luc va) OR (truc va)) han tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu san)) ky tang xa hoi. hieu va cam ((luc va) or (truc va)) han tai cuc tre*.