Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, lang xa, mang xa
doi cua » dai cua, hoi cua, dong cua
nang ma » sang ma, nang cao, mang may
luc van » luoc van, luu van, duc van
tang ma » mang may, tang van
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
va cham » va chat, va tham
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 (nang ma))) or (tang ma)) hoi. hieu va cham luc van hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((((nang xa) OR (nang ma))) OR (tang ma)) hoi. hieu va cham luc van hanh doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((((nang xa) OR (nang ma))) or (tang ma)) hoi. hieu va cham luc van hanh doi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((((nang xa) OR (nang ma))) or (tang ma)) hoi. hieu va cham luc van hanh doi cua te*.