Perhaps you should try some spelling variations:
trinh cua » tinh cua, trinh quan, trinh luan
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
tu san » thu san, tu ban, tu can
te sac » te sach, te cac, te san

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) or (tu san)) ky lang ha hoi. hieu va cam tuc va hanh ((trinh cua) OR (trinh luat)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (tu san)) ky lang ha hoi. hieu va cam tuc va hanh ((trinh cua) OR (trinh luat)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (tu san)) ky lang ha hoi. hieu va cam tuc va hanh ((trinh cua) OR (trinh luat)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (tu san)) ky lang ha hoi. hieu va cam tuc va hanh ((trinh cua) OR (trinh luat)) tre*.