Perhaps you should try some spelling variations:
phat luc » nhan luc, phat huy, chat lua
van hanh » van thanh, ban hanh, van anh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ma hoa. hieu va phat luc ((van hanh) or (va danh)) le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ma hoa. hieu va phat luc ((van hanh) OR (va danh)) le cua tre*.