Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
te sach » toc sach
sach ty » sach y, sach tu, sach thu
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang x) OR (nang ma)) hoi. hieu va ((cham luc) OR (nhan luc)) va hanh doi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang x) or (nang ma)) hoi. hieu va ((cham luc) OR (nhan luc)) va hanh doi cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang x) or (nang ma)) hoi. hieu va ((cham luc) OR (nhan luc)) va hanh doi cua te*.