Perhaps you should try some spelling variations:
cham luc » nhan luc, cham cuu, chat lua
te sach » toc sach
va danh » va dinh, va dan, va hanh
va lanh » va lang, va hanh, va anh
dao cua » dai cua, day cua, dan cua
hieu vu » hieu va, hieu ve, hieu su
tang ma » mang may, tang van
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa

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