Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
cham luc » nhan luc, cham cuu, chat lua
te sach » toc sach
doi cua » dai cua, hoi cua, dong cua
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
nang xa » nang x, lang xa, nang ma
cua te » cua tu

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