Perhaps you should try some spelling variations:
kem phat » te phat, de phat, tam phat
te sach » toc sach
nang ma » tang ma, sang ma, mang may
hieu va » lieu va, hieu qua
lam luc » lao luc, lam duoc
va hanh » van hanh, va thanh, va danh
va lam » van lam, va lap
luc va » duc va, tuc va, loc va

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 y ((nang ma) OR (nang cao)) hoi. hieu va lam luc va hanh kem phat trien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang ma) OR (nang cao)) hoi. hieu va lam luc va hanh kem phat trien".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) OR (nang cao)) hoi. hieu va lam luc va hanh kem phat trien*.