Perhaps you should try some spelling variations:
va tuyen » va truyen, tac tuyen, ke tuyen
va hanh » van hanh, va thanh, va danh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ha » hieu hoa, hieu va, hieu xa
hieu ca » hieu cac, hieu cua, hieu va
hanh de » hanh ve, hanh kem
nam luc » nang luc, nhan luc, nam thuc
te sac » te sach, te cac, te san
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
thiet » thieu

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 lang xa hoi. ((hieu ha) OR (hieu ca)) nam luc va hanh de ((va tuyen) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((hieu ha) OR (hieu ca)) nam luc va hanh de ((va tuyen) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. ((hieu ha) OR (hieu ca)) nam luc va hanh de ((va tuyen) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu ha) OR (hieu ca)) nam luc va hanh de ((va tuyen) or (va thiet))*.