Perhaps you should try some spelling variations:
thanh ket » thanh ke, hanh kem, thanh dat
te sach » toc sach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va cam » va cham, va cac, va cao
tuc va » truc va, tuc xa, duc va
tuyen » truyen, quyen

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 ((ky lang) or (ky tang)) xa hoi. hieu va cam ((tuc va) OR (thuc va)) thanh ket ke tuyen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) xa hoi. hieu va cam ((tuc va) OR (thuc va)) thanh ket ke tuyen.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (ky tang)) xa hoi. hieu va cam ((tuc va) OR (thuc va)) thanh ket ke tuyen".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky tang)) xa hoi. hieu va cam ((tuc va) OR (thuc va)) thanh ket ke tuyen*.